The geometrical conditions are analytically calculated in which two interlinked second- order nonlinear interactions generating entangled triplets are phase-matched in 3D. The interactions are the spontaneous parametric downconversion of an intense pump and the upconversion of a portion of the downconversion cones by a further pump. The calculation applies to type-I interactions occurring in uniaxial crystals and allows us to forecast positions and frequencies of the entangled triplets experimentally generated. The photon number statistics and the intensity correlations are also measured.
Calculation of the 3D interaction geometry for two interlinked chi(2) processes generating entangled triplets
ALLEVI, ALESSIA
;ANDREONI, ALESSANDRA
2007-01-01
Abstract
The geometrical conditions are analytically calculated in which two interlinked second- order nonlinear interactions generating entangled triplets are phase-matched in 3D. The interactions are the spontaneous parametric downconversion of an intense pump and the upconversion of a portion of the downconversion cones by a further pump. The calculation applies to type-I interactions occurring in uniaxial crystals and allows us to forecast positions and frequencies of the entangled triplets experimentally generated. The photon number statistics and the intensity correlations are also measured.
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